Adjustable die-stock.



PATENTED APR. 10, 1906.

B. BURDEN.

ADJUSTABLE DIE STOCK.

APPLIOATION FILED MAY 19. 1905.

2 SHEBTS-SHBBT 1.

2 SHEETS-SHEET 2.

PATENTED APR. 10, 1906.

B. BURDEN.

ADJUSTABLE- DIE STOCK. APPLIOATION FILED MAY 19. 1905.

wmKv/f M H A n d W 0 y E 6 8 W J v w a m 1 q 1 r J 1 i3: M \\w BRADFORD BORDEN, OF Vl/"ARREN, OHIO, ASSIGNOR TO THE BQRDEN COMPANY, OF WARREN, OHIO, A CORPORATION OF OHIO.

ADJUSTABLE DEE-"STOCK.

Specification of Letters Patent.

Patented April 10, 1906.

Application filed May 19,1905. Serial No. 261,220.

To all whom it may concern: 7

Be it known that I, BRADFORD BORDEN, of Warren, in the county of Trumbull and State of Ohio, have invented certain new and useful Improvements in Adjustable Die-Stocks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

In Letters Patent No. 744,465, issued to me November 17, 1903, I showed and described an adjustable die-stock wherein the adjustment of the two die-blocks is controlled by the inward and outward move ments of a single adjusting device carrying a set-screw whereby the die-blocks may be ad justed for cutting threads of different depths and on pipes of various sizes. I11 an application filed by me on January 4, 1905, Serial No. 239,669, I showed and described means for limiting the outward movements of the adjuster when the die-blocks are drawn apart to allow of the removal and insertion of pipes, and in such application I showed a centering device extended rearwardly from the cliestock. It frequently transpires in practice that it is necessary to thread a short section of pipe which if passed through the centering device could not reach the chasers, or at least to a suflicient extent to allow of the cutting of a thread of the desired extent.

The objects of my present improvement are, first, to provide improved means for holding the adjuster and the die-blocks within the housing and yet allow for the ready and easy movements of the adjuster; secondly, to enable the die-blocks to be reversed so that the cutting may be done from the front of the deviceas, for instance, when a thread is to be out upon a short section of pipe, and, lastly, to enable the adjuster and dies to be inserted from either end.

The invention will be hereinafter fully set forth, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is i an elevation with the die-blocks in the position ordinarily occupied. Fig. 2 is a similar view with the die-blocks and the adjuster reversedthat is, with. their normally inner sides facing outwardly. Fig. 3 is a cross-sectional view on line 3 3, Fig. 2. Fig.4 is a similar view on line 4 4, Fig. 1. Fig. 5 is a view in perspective of the retaining-plate and a portion of the housing and adjuster.

Referring to the drawings, 1 designates the housing, having an open front and straight end walls 2, between which and between upper and lower walls 3 and 4 are located die-blocks 5, inclined toward each other along their side walls, so as to conform to the correspondingly-inclined faces of the side members of the free-sliding adjuster 6. This latter is shown in the form of a frame composed of corresponding side members and a connecting portion 7, wherein is mounted a set-screw 8, all as pointed out in my before-noted patent. The die-blocks are, as in the patent, formed with grooves to accommodate tongues 9 of the overlapping portions of the side members i are shown as tapered, so as to produce a taper thread. In the present instance provision is made for cutting threads when pipes are presented at the front instead of from the rear. This is frequently necessary where but a short section of pipe is to be threadcd as, for instance, a piece projecting from a joint or elbow of insullicient length to be introduced from the rear through the centering device. To enable this to be accomplished and at the same time provide means for holding the adjuster as well as the die-blocks as against lateral displacement, I provide a re taining-plate 12, which is pivoted at one end on a threaded rod 13, extending from the housing adjacent one side wall 2 thereof, the other end of the plate being formed with a hook or open-end slot 14, which is designed to engage a threaded rod 15 at the opposite side of the housing. Each of these threaded rods is provided with a thumb-nut 16, the tightening of which will so hold the lockingplate in position as to prevent any outward deflection of the adjuster or the die-blocks. From the inner face of this holding-plate, immediately adjacent the pivoted end thereof, projects a short stud 17, which when the plate is locked into position will extend into a groove 18, formed on the face of one of the side members of the adjuster 6, such lug serving to limit the outward movement of the adjuster in releasing the die-blocks. When, however, it is desired to entirely withdraw the adjuster, as when new die-blocks are to be substituted or the die-blocks and adjuster are to be reversed, the l1olding-plate is released at its hooked end and turned on its pivot, the lug 17 traveling in a curved groove 19 of the housing adjacent to the pivot 13. This clears the adjuster of the stop-lug and permits it to be withdrawn.

In Fig. 1 I have shown the dieblocks fixed for threading pipes inserted from the rear, as customary; but in Fig. 2 I have shown the same die-blocks reversed face for facethat is, with their normally inner faces outwardthe adjuster being also reversed. Under the arrangement shown in Fig. 2 the entire outward thrust of the die blocks is against the locking-plate, whereas in the other the adjuster in part retains the die-blocks.

Another advantage arising from the present construction is that the die-blocks and the adjuster may be transposed end for end that is to say, when the adjuster is presented so as to overlap the die-blocks.

I claim as my invention 1. A die-stock comprising an open-front housing, sectional dies within the housing, a free-sliding adjuster for such dies, a lockingplate secured at its ends to said housing and extended transversely of the dies and adjuster, and means carried by said plate for limiting the outward movements of the ad I juster.

2. A die-stock comprising an open-front housing, sectional dies within the housing, a free-sliding adjuster for such dies, having a groove in its outer face adjacent one side thereof, a locking-plate secured at its ends to said housing and extended transversely of the dies and adjuster, and a lug carried by said plate extending into said groove for limiting the outward movements of the adjuster.

3. A diestock comprising an open-front housing, sectional dies within the housing, a free-sliding adjuster for such dies, having a groove in its outer face adjacent one side thereof, a locking-plate secured at its ends to said housing and extended transversely of the dies and adjuster, said housing having a groove in its face adjacent one end of said plate, and a lug carried by said plate extending into said groove of the adjuster when the plate is located transversely of the latter and into said groove of the housing when the plate is out of its normal position.

4. A die-stock comprising an open-front housing, sectional dies within the housing, said dies being reversible face for face, an adjuster having means for engaging said dies for moving the same, said adjuster being also reversible, and means for preventing outward deflection of the dies.

5. A die-stock comprising an open-front housing, sectional dies within the housing, said dies being reversible face for face, an adjuster having means for engaging said dies for moving the same, said adjuster being also reversible, and a locking-plate pivotally secured at one end to the housing and designed to extend transversely of said dies and adjuster, and means for engaging and holding the free end of said locking-plate.

6. A die-stock comprising an open-front housing, sectional dies within the housing, the threads of said dies being tapered, both dies being capable of being reversed within the housing, a free-sliding adjuster for said dies having grooves on its inner and outer faces adjacent the edges of its side members, said adjuster being also reversible, a lockingplate pivotally secured at one end to said housing and designed to be secured at its other end when extended transversely of said dies and adjuster, and a lug extending from said locking-plate into said groove for limiting the outward movements of the adjuster.

7. A die-stock comprising an open-front housing, sectional dies Within the housing, the threads of said dies being tapered, a freesliding adjuster for said dies having a groove on its outer face adjacent the edge of one side member, a locking-plate pivotally secured at one end to said housing and designed to be secured at its other end when extended transversely of said dies and adjuster, said housing having a curved groove in its front face adj acent to the pivoted end of said plate, and a lug extended from said plate adjacent the pivoted end thereof for extending into the groove of the adjuster when the plate is extended transversely of the latter, said lug working in said curved groove when the plate is swung out of the way.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

BRADFORD BORDEN. WVitnesses:

FRANK S. OHRYsT, JOHN R. LACHMAN. 

